27-3m的平方(因式分解)

问题描述:

27-3m的平方(因式分解)

27-3m^2=3(9-m^2)=3(3+m)(3-m)

27-3m^2
=3*(9-m^2)
=3(3+m)(3-m)

3(3+m)(3-m)

楼上正解~
=3(9-m²)
=3(3+m)(3-m)

=3(9-m²)
=3(3+m)(3-m)